package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    //读取固定码
    @Value("${reggie.salt}")
    private String salt;

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {

        //1、将页面提交的密码password进行md5加盐加密处理, 得到加密后的字符串
        String password = employee.getPassword();
        password += salt;    //用户输入密码  拼接  固定码
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、根据页面提交的用户名username查询数据库中员工数据信息
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3、如果没有查询到, 则返回登录失败结果
        if (emp == null) {
            return R.error("登录失败");
        }

        //4、密码比对，如果不一致, 则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("登录失败");
        }

        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("该账号已禁用");
        }

        //6、登录成功，将员工id存入Session, 并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }


    /**
     * 员工退出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request, HttpSession session) {
        //清理session中保存的当前登录员工的id
//        request.getSession().removeAttribute("employee");
        //注意：这里springmvc处理请求的方法，可以直接注入HttpSession对象使用
        //删除session的数据有两种方法：
        //方式一：删除session中的一个键值对   session.removeAttribute("employee");
        session.removeAttribute("employee");
        //方式二：删除session对象        session.invalidate();
        return R.success("成功退出");
    }

    /**
     * 新增员工
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工，员工信息：{}", employee.toString());
        //获取执行的线程信息
        long id = Thread.currentThread().getId();
        log.info("线程id为：{}", id);

        //设置初始密码123456，并进行md5的加盐加密
        employee.setPassword(DigestUtils.md5DigestAsHex(("123456" + salt).getBytes()));

       /* employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //获取当前登录用户的id
        Long employId = (Long) request.getSession().getAttribute("employee");

        employee.setCreateUser(employId);
        employee.setUpdateUser(employId);*/

        employeeService.save(employee);  //这个位置会触发 元数据处理器自动插入填充操作

        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     *
     * @param page     当前查询页码
     * @param pageSize 每页展示记录数
     * @param name     员工姓名 - 可选参数
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page = {},pageSize = {},name = {}", page, pageSize, name);
        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);

        //构造条件构造器
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper();
        //添加模糊查询条件
        lqw.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //添加排序条件
        lqw.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo, lqw);

        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     *
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("修改的employee为：{}", employee.toString());
        //获取执行的线程信息
        long id = Thread.currentThread().getId();
        log.info("线程id为：{}", id);

      /*  //获取当前登录用户的Id
        Long employId = (Long) request.getSession().getAttribute("employee");

        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(employId);*/

        //执行修改
        employeeService.updateById(employee); //这个位置会触发 元数据处理器自动更新填充操作


        return R.success("员工信息修改成功");


    }

    /**
     * 根据id查询员工信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        log.info("查询id为：{}的员工信息", id);
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");

    }

}